Cold-Infused Roasted Hazelnut Icebox Cake with Dark Cocoa Snaps

Instructions

1. 1

   Preheat your oven to 350°F (175°C). Spread 200g raw hazelnuts across a rimmed baking sheet and roast for 12 to 14 minutes, shaking halfway through, until the skins are split and the nut meat is a deep golden bronze. Transfer to a clean kitchen towel, fold, and rub vigorously to shed the skins. Let cool completely.

   15 min

   Tip: Do not pull them early. Pale hazelnuts taste like damp paper; dark-roasted hazelnuts deliver the deep pyrazines that perfume cold dairy.

2. 2

   Coarsely crush 150g dark-roasted hazelnuts using the flat side of a heavy chef's knife—aim for split halves and rough chunks, not dust. Tip them into a glass jar or bowl, pour over 480g heavy whipping cream, cover tightly, and refrigerate for at least 12 hours (and up to 24 hours). Reserve the remaining roasted nuts for the topping.

   5 min

   Tip: Crushing the nuts exposes maximum surface area to the cold dairy fat without turning it gritty or releasing heavy nut oils.

3. 3

   Set a fine-mesh sieve over a chilled metal mixing bowl. Pour the chilled cream through the strainer, pressing gently on the hazelnut solids with a silicone spatula to coax out every drop of hazelnut essence. Discard or repurpose the spent nuts. Cover the bowl and return the strained cream to the fridge for 15 minutes to guarantee it is ice-cold.

   5 min

   Tip: Cold dairy whips faster and yields a tighter, more stable emulsion. Warm cream collapses under its own fat.

4. 4

   Roughly chop the remaining 50g dark-roasted hazelnuts. Place them in a small nonstick skillet over medium-low heat with 25g granulated sugar and 0.5g fine sea salt. Cook undisturbed for 3 minutes until the sugar melts, then stir continuously with a heatproof spatula for 2 minutes until the nuts are coated in amber caramel. Scrape onto parchment paper, cool completely, and chop into rough crackle.

   8 min

   Tip: Salt in the praline crackle cuts through the sugar and resets your palate between bites.

5. 5

   Line an 8.5x4.5-inch loaf pan with a double layer of plastic wrap, leaving a 2-inch overhang on all sides. Retrieve the chilled hazelnut cream and add 60g powdered sugar, 5g pure vanilla bean paste, and 1.5g fine sea salt. Whip on medium-high speed until it holds medium-stiff peaks that gently curl at the tips (about 2 to 3 minutes).

   5 min

   Tip: Stop at medium-stiff peaks. Over-whipped cream tastes greasy and will weep moisture as the cake rests.

6. 6

   Spread an even 1/2-inch layer of hazelnut cream along the bottom of the prepared loaf pan. Lay down 60g thin bittersweet cocoa wafer cookies in a flat, tight layer, snapping a few cookies to patch gaps. Spread another layer of cream, top with another 60g thin bittersweet cocoa wafer cookies, repeat with a third layer of cream and remaining 60g thin bittersweet cocoa wafer cookies, then cap with the remaining hazelnut cream. Smooth the top with an offset spatula.

   12 min

   Tip: Wipe your offset spatula clean between sweeps. Level layers ensure clean, horizontal zebra stripes when sliced.

7. 7

   Fold the plastic wrap overhang over the top of the cake to seal. Refrigerate for at least 8 hours, preferably overnight, to allow the moisture from the cream to hydrate the cocoa wafers into delicate sponge cake. To serve, unfold the plastic, invert the cake onto a chilled cutting board, lift off the pan, and peel away the plastic wrap. Scatter the top generously with the reserved hazelnut crackle and finish with 2g flaky sea salt. Slice with a hot, dry chef's knife.

   7 min

   Tip: Let it rest. Future you deserves clean slices. Dip the knife in hot water and wipe it dry with a towel before every single cut.